American water plantain

A tall, spindly, many-branched aquatic with small white (rarely pink) flowers in whorls. In this typical emergent aquatic, the lower part is often submerged, while the upper part is exposed. Leaves formed underwater are ribbon-like and soon rot; they are seldom seen on adult plants. The bulb-like base of several species of Alisma was dried and eaten by Native Americans.

Members of the Water-Plantain Family grow in water, in swamps, on muddy banks, or occasionally in wet sand. Each plant has long-petioled leaves in a clump with a flowering stem rising among them. The flowers have 3 green sepals, 3 white or pink-tinged petals, 6 or more stamens, and several pistils. Stamens and pistils may be in separate flowers.